Chimney Chase Cover Replacement in High Point, NC

High Point Chimney Repair fabricates and installs replacement chase covers for prefabricated chimneys throughout High Point, North Carolina, where the original galvanized cover has rusted through and started staining the siding below.

Chase Covers Are Not Chimney Crowns

If your chimney is a framed, sided box rather than solid brick, you have a prefabricated chimney — a factory-built metal firebox and flue running up inside a wood-framed chase. It is an extremely common configuration in homes built from the 1980s onward.

The top of that chase is closed by a chase cover: a large sheet-metal lid, folded at the edges, with a hole for the flue to pass through. It performs the same function a masonry crown performs on a brick chimney, but it is a completely different component with a completely different failure mode.

The distinction matters when you are getting quotes. A crown is cast concrete on a brick stack. A chase cover is fabricated metal on a framed chase. Anyone quoting you crown work on a sided chimney has not looked at it.

How to Tell Yours Has Failed

Chase cover failure follows a predictable and highly visible progression, and it is one of the few chimney problems you can diagnose reliably from the ground.

Rust staining on the siding. Brown or orange streaks running down the sides of the chase directly below the top edge. This is the first sign, and it means the cover is already corroding.

Standing water on the cover. Most failed covers were fabricated flat with no slope or crown to the center. Water ponds, sits, and works through the metal. If you can see a puddle up there after rain, the cover is failing.

Visible rust or perforation around the flue collar, where water pools first.

Water in the firebox or staining on the ceiling near the chase — by this point the cover has holes and the chase framing is getting wet.

The consequence of ignoring it is not just a rusted lid. Water entering the chase soaks the wood framing and insulation inside, rots the structure, and corrodes the metal firebox and flue pipe. A chase cover replacement is inexpensive; replacing rotted chase framing is not.

Why the Originals Fail

Builders overwhelmingly specified galvanized steel chase covers, because they are the cheapest option and they look identical to better materials on the day the house is finished.

Galvanized coating protects the steel underneath only until it is breached. Once it is, corrosion runs. In the Piedmont’s humidity and rainfall, a galvanized cover commonly begins failing somewhere between eight and fifteen years. Compounding it, the stock covers are usually cut flat with minimal edge return, so they hold water and have no drip edge to throw runoff clear of the siding.

Fabrication and Fit

We measure the chase and fabricate the replacement to those dimensions rather than fitting a stock size and sealing the gap.

Stainless steel is our standard replacement. It does not rust, and it is the last chase cover the house will need.

Copper is available where appearance matters, and it weathers to a patina that suits period and higher-end homes.

Every cover we fabricate is built with a cross-break or slope — a shallow ridge formed into the panel so water runs off toward the edges instead of ponding in the middle — and with edge returns deep enough to overhang the chase so runoff drips clear of the siding rather than tracking down it. The flue collar is sized to the pipe and sealed with high-temperature sealant.

We replace the storm collar and inspect the flue pipe and cap while the top is open, since access is the expensive part of this job and it is inefficient to make that trip twice.